You can use this Rectangular Stamp Mockup to display your stamp Design in your presentation in a simple and realistic way. You just need to put your design in the smart layer and it is done. You can modify the background colour according to your requirements. You need to have photoshop to edit it.
File Format: PSD
Dimensions: 2400×1700 px
Size: 18 Mb
License: Free for personal & commercial use